Abstract

When a host establishes a new link-layer connection, it may or
may not have a valid IP configuration for Internet connectivity. The
host may check for link change (i.e., determine whether a link change
has occurred), and then, based on the result, it can automatically
decide whether its IP configuration is still valid. During
link identity detection, the host may also collect necessary
information to initiate a new IP configuration if the
IP subnet has changed. In this memo, this procedure is called
Detecting Network Attachment (DNA). DNA schemes should be precise,
sufficiently fast, secure, and of limited signaling. This memo provides information for the Internet community.